/*
 * Copyright (c) 2001-2004 Caucho Technology, Inc.  All rights reserved.
 *
 * The Apache Software License, Version 1.1
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Caucho Technology (http://www.caucho.com/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "Burlap", "Resin", and "Caucho" must not be used to
 *    endorse or promote products derived from this software without prior
 *    written permission. For written permission, please contact
 *    info@caucho.com.
 *
 * 5. Products derived from this software may not be called "Resin"
 *    nor may "Resin" appear in their names without prior written
 *    permission of Caucho Technology.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @author Scott Ferguson
 */

package com.caucho.hessian.client;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Internal connection to a server. The default connection is based on java.net
 */
public class HessianURLConnection extends AbstractHessianConnection {
	private URL _url;
	private HttpURLConnection _conn;

	private int _statusCode;
	private String _statusMessage;

	private String receiveEncoding="UTF-8";

	HessianURLConnection(URL url, HttpURLConnection conn) {
		_url = url;
		_conn = conn;
	}

	/**
	 * Adds a HTTP header.
	 */
	public void addHeader(String key, String value) {
		_conn.setRequestProperty(key, value);
	}

	/**
	 * Returns the output stream for the request.
	 */
	public OutputStream getOutputStream() throws IOException {
		return _conn.getOutputStream();
	}

	private String readByBufferedReader(InputStream in, String receiveEncoding)
			throws IOException {
		// 封装成高级对象
		BufferedReader bufferedReader = new BufferedReader(
				new InputStreamReader(in, receiveEncoding));
		// 内容集合(集合项为行内容)
		// httpResponser.setContentCollection(new Vector<String>());
		StringBuffer temp = new StringBuffer();
		String line = bufferedReader.readLine();
		while (line != null) {
			// httpResponser.getContentCollection().add(line);
			temp.append(line);
			line = bufferedReader.readLine();
			if (line != null)
				temp.append("\r\n");
		}
		bufferedReader.close();
		in.close();
		return temp.toString();
	}
	
	public String readByByte(InputStream inputStream,String receiveEncoding) throws IOException{
		int dataLen=inputStream.available();
		if(dataLen<1){
			return readByBufferedReader(inputStream,receiveEncoding);
		}
		System.out.println("dataLen:"+dataLen);
		int bufferLen=1024*5;
		if(bufferLen>dataLen){
			bufferLen=dataLen;
		}
		byte[] htmlByte = new byte[dataLen]; 
		int offset=0;
		int len=-1;
		do{
			len = inputStream.read(htmlByte,offset,bufferLen);
			offset+=len;
			int temp=dataLen-offset;
			if(temp<1){
				break;
			}else if(temp<bufferLen){
				bufferLen=temp;
			}
		}while( len!= -1 );
		inputStream.close();
		return new String(htmlByte,receiveEncoding);
	}

	/**
	 * Sends the request
	 */
	public void sendRequest() throws IOException {
		if (_conn instanceof HttpURLConnection) {
			HttpURLConnection httpConn = (HttpURLConnection) _conn;
			_statusCode = 500;
			try {
				_statusCode = httpConn.getResponseCode();
			} catch (Exception e) {
			}
			parseResponseHeaders(httpConn);
			InputStream is = null;
			if (_statusCode != 200) {
				StringBuffer sb = new StringBuffer();
				try {
					is = httpConn.getInputStream();
					if (is != null) {
						sb.append(readByByte(is,receiveEncoding));
					}else{
						is = httpConn.getErrorStream();
						if (is != null) {
							sb.append(readByByte(is,receiveEncoding));
						}
					}
					_statusMessage = sb.toString();
				} catch (FileNotFoundException e) {
					throw new HessianConnectionException("HessianProxy cannot connect to '" + _url, e);
				} catch (IOException e) {
					if (is == null)
						throw new HessianConnectionException(_statusCode + ": " + e, e);
					else
						throw new HessianConnectionException(_statusCode + ": "
								+ sb, e);
				}finally{
					if (is != null)
						is.close();
				}
				throw new HessianConnectionException("Status code:"+_statusCode + "\n"+ _statusMessage);
			}
		}
	}
	protected String regexSearch(String searchStr, String regex) {
		
		String result = null;
		Pattern p = Pattern.compile(regex);
		Matcher m = p.matcher(searchStr);
		if (m.find()) {
			result = m.group();
			result = result.trim() != "" ? result : null;
			
		} 
		System.out.println(m.end());
		return result;
	}
	protected void parseResponseHeaders(HttpURLConnection conn)
			throws IOException {
	}

	/**
	 * Returns the status code.
	 */
	public int getStatusCode() {
		return _statusCode;
	}

	/**
	 * Returns the status string.
	 */
	public String getStatusMessage() {
		return _statusMessage;
	}

	/**
	 * Returns the InputStream to the result
	 */
	public InputStream getInputStream() throws IOException {
		return _conn.getInputStream();
	}

	/**
	 * Close/free the connection
	 */
	public void close() {
	}

	/**
	 * Disconnect the connection
	 */
	public void destroy() {
		_conn.disconnect();
	}
}
